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LM2596
SNVS124D – NOVEMBER 1999 – REVISED MAY 2016
LM2596 SIMPLE SWITCHER® Power Converter 150-kHz
3-A Step-Down Voltage Regulator
1 Features
3 Description


The LM2596 series of regulators are monolithic
integrated circuits that provide all the active functions
for a step-down (buck) switching regulator, capable of
driving a 3-A load with excellent line and load
regulation. These devices are available in fixed output
voltages of 3.3 V, 5 V, 12 V, and an adjustable output
version.
1












3.3-V, 5-V, 12-V, and Adjustable Output Versions
Adjustable Version Output Voltage Range: 1.2-V
to 37-V ± 4% Maximum Over Line and Load
Conditions
Available in TO-220 and TO-263 Packages
3-A Output Load Current
Input Voltage Range Up to 40 V
Requires Only 4 External Components
Excellent Line and Load Regulation Specifications
150-kHz Fixed-Frequency Internal Oscillator
TTL Shutdown Capability
Low Power Standby Mode, IQ, Typically 80 μA
High Efficiency
Uses Readily Available Standard Inductors
Thermal Shutdown and Current-Limit Protection
Create a Custom Design Using the LM2596 with
the WEBENCH Power Designer
Requiring a minimum number of external
components, these regulators are simple to use and
include internal frequency compensation, and a fixedfrequency oscillator.
The LM2596 series operates at a switching frequency
of 150 kHz, thus allowing smaller sized filter
components than what would be required with lower
frequency switching regulators. Available in a
standard 7-pin TO-220 package with several different
lead bend options, and a 7-pin TO-263 surface mount
package.
Device Information(1)
PART NUMBER
2 Applications



Simple High-Efficiency Step-Down (Buck)
Regulator
On-Card Switching Regulators
Positive to Negative Converter
LM2596
PACKAGE
BODY SIZE (NOM)
TO-220 (7)
14.986 mm × 10.16 mm
TO-263 (7)
10.10 mm × 8.89 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Typical Application
(Fixed Output Voltage Versions)
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.
LM2596
SNVS124D – NOVEMBER 1999 – REVISED MAY 2016
www.ti.com
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